Diagnosing Lemon Tree Issues: Scale, Fruit Spots, and Mysterious Grey Coating

Information Needed

To distinguish between scale insects, fungal diseases, and other issues, please describe:

1. White spots on bark: Regular shape? Circular/oval, ~5 mm (1/16")? If yes → scale insects.
2. Black spots on fruit: Also on leaves? Halos around spots?
3. Whitish-grey material on fruit: Tap over white paper—see powder? Stringy like spider silk?

Why Details Matter

• Scale insects (common on citrus) cause honeydew → sooty mold.
• Fungal pathogens (anthracnose, etc.) cause distinct fruit/leaf lesions.
• Treatment differs entirely.

Provide as much detail as possible for accurate guidance.